Rebounding-plunger press



(No Model.) 2 Sheets8het 1,.

T. J. STRAIT. V REBOUNDING PLUNGER PRESS.

No. 449,601. Patented Mar. 31, 1891 Qwitmaom anvgm Coz mi NORRIS PETERScm, mom-mum, msnmarou, n. c

(No Model.) 2'SheetsSheet 2.

' T.'J. STRAIT.

REBOUNDING PLUNGER PRESS. No. 449,601. Patented Mar. 31, 1891'.

Z ail iiiiim 7 [fl fife a UNITED STATES PATENT ()EEIcE.

THOMAS J. STRAIT, OF \VILLIAMSPORT, PENNSYLVANIA.

REBOUNDING-PLUNG ER PRESS SPECIFICATION forming part of Letters PatentNo. 449,601, dated March 31, 1891.

Application filed November 21, 1890. Serial No. 372,209. (No model.)

To all 1071 0177, it may concern:

Be it known that I, THOMAS J. STRAIT, a citizen of the United States,residing at Williamsport, in the county of Lycoming and State ofPennsylvania, have invented certain new andusefullmprovementsinRebounding- Plunger Presses; and Ido hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention has relation to that class of presses known as reboundingplungers.

The object is to improve upon the mechanism for operating the plunger;and to that end the invention consists :of constructions andcombinations, as will hereinafter be set forth in the specification, andpointed out in the claims, reference beinghad to the accompanyingdrawings, in which T Figure 1 represents a top plan showingone of thepositions of the operating mechanism; Fig. 2, a similar View showing thesame parts in a different position and the radii or arms of thetoggle-lever on a right line in full lines and the next position indotted lines; Fig. 3, a side elevation of part of the device; and Fig.at, a section on line 4: 4:, Figs. land 2.

The press and frame-work A of the machine are substantially the same asall devices of this class, so only so much of the frame A is shown aswill give the necessary supports to the improved device. The frame A isprovided with a vertical pin or shaft A, set up and supported in theusual manner on the same longitudinal line that the plunger is workedupon. Upon this shaft is awheel A which may be loose upon the shaft ifthe shaft be fixed, or fixed or loose upon the shaft if the latter beloose. This wheel is provided with a lever or sweep A by which it ispartially rotated upon its axis in the manner common in this class ofdevices. The rim 0. of the wheel on the side opposite to that to whichthe sweep is secured is cut away at d to form arecess or track c whichterminates at each end in a recess or stop a havinglips a. The track ison a curve orarc of a circle of less diameter than the wheel, and has asub-track formed by the rabbet (0 B represents the toggle-leversarranged in pairs, the arms 17 of one pair being pivoted at one end tothe plunger, and the arms bof the other pair being pivoted to the shaftA, one above and the other below the wheel A and hinged or connected tothe arms b by a pintle b placed vertically at a point about midwaybetween the track-c and the are described by the lips a when the wheelis turned. This brings the pintle 11 when the wheel is ready to movefrom either side, directly in the path of the stops a so that when thewheel is moved it forces the pintle to advance with the stop that ithappens to be engaged with until the arms of the toggle have passed theright line, when it is released by reason of the back-pressure of thehay acting to deflectthe arms of the toggle in the opposite direction.This movement of the arms of the toggle moves the pintle into the recessor'stopa opposite to that which ithad just left, so as to be ready tomove the toggle in a reverse direction.

To guide the pintle to its proper place, a block B is interposed betweenthe arms Z) and Z) and pivoted on the pintle b and fitted to the tracks(0 and d by rabbeting the face The corners I)" may also be beveled tofit into the recess or stop a and overlapped bv the lips o to preventthe block from jumping out or bending the pintle when sent into the stopa by a rebound. The block also protects the pintle .to a great extent,and in fact prevents it from bending when the blows due to the reboundare very hard. In practice buffers are placed in the recesses or steps ato moderate the jar as much as possible.

The device is operated as follows: Hay being placed in the press, thesweep is moved around the end of the machine until the pintle of thetoggle has been moved over the right line, so as to press the hay andthen give the back-pressure a chance to act to bend the toggle-lever. Assoon as the pintle passes said right line the backpressure throws theblock around the recess or track a until it reaches the opposite stopfrom which it started. The movement of the sweep is now reversed toproduce the same result in an opposite direction of draft.

\Vhat I claim as new is,

1. In a press of the kind described, the combination of a wheel havingan arc-shaped recess in its periphery, and n toggle-lever thehinge-pintle of which is held by the arms of the toggle in said recessand is moved by contacting with the stops at the ends of said 5 recesswhen the wheel is moved.

2. In a press of the kind described, the combination of a wheel havingan are-shaped recess and track in its periphery, and a toggle-leverhaving on its hinge-pintle a block which rests upon said track and ismoved by the ends of the recess contacting therewith when the wheel ismoved.

